#Substring java example how to#
How to Implement Thread-Safe Bounded Buffer in Jav. The substring() method will throw IndexOutOfBoundsException if start end.Īnd here is a nice summary slide of all the important things you learned about the substring() method in this article by doing those examples:. The substring() method will return an empty String if beginIndex= endIndex. In the second method, startIndex is inclusive but endIndex is exclusive, which means if you want to remove the last character then you need to give substring(0, string.length()-1). So if you want to remove the first character, just do substring(1), it will return substring without the first character, equal to deleting the first character. There is two substring() method, first accept only starting point while second expect both starting and endpoints. Important points about substring() in Java It's also worth knowing that substring will return an empty String if you pass the length of String as a start in the first version and the same index as start and end in the second method, as shown in our substring example in Java. While substring(int beginIndex, int endIndex) will throw IndexOutOfBoundException if beginIndex is negative, or larger than endIndex or end > length(). Remember substring(int beginIndex) method will throw IndexOutOfBoundException if, an index is less than zero or more than length of String. StringIndexOutOfBoundsException :Īt java. 
Public class SubStringTest OutputĮxception in thread "main" java. Let's see a couple of examples of substring methods to learn how they work: Since String in Java is zero indexes based, beginIndex can be from 0 to length of String. In the case of the first method, substring starts with beginIndex and goes till the end of String, while, in the case of an overloaded method, substring starts from beginIndex and goes till endIndex -1. Public String substring ( int beginIndex ) public String substring ( int beginIndex, int endIndex ) Substring method is overloaded in Java, and we have two variants of it, first, accept one parameter, just begin index and second accept two parameters, begin index and end index as shown below: SubString in Java - Description, Syntax, and Example
In the next section, we will see the syntax of the substring method and How to use it for practical purposes. One more thing, which is also worth remembering is that, whenever you call the substring method, it returns a separate String object, because String is immutable in Java.
0 kommentar(er)
